<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style>
			*{
				margin: 0;
				padding: 0;
			}
			.div1{
				width: 100px;
				height: 100px;
				background-color: red;
				float: left;
			}
			.div2{
				width: 100px;
				height: 100px;
				background-color: blue;
				float: left;
			}
			.div3{
				width: 100px;
				height: 100px;
				background-color: green;
				float: left;
			}
			.div4{
				background-color: pink;
			}
			.p{
				width: 500px;
				height: 200px;
				background-color: black;
			}
			.clear{
				clear: both;
			}
			
			li{
				list-style: none;
				width: 80px;
				background-color: grey;
				color: #fff;
				text-align: center;
				float: left;
			}
			div{
				width: 800px;
				height: 300px;
				background-color: red;
			}
			ul:after{
				content: "";
				display: block;
				clear: both;
			}
		</style>
	</head>
	<body>
		
		<!--<div class="div1"></div>
		
		<div class="div2"></div>
		
		<div class="div3"></div>
		
		<div class="clear"></div>
		<div class="div4"></div>
		
		<p class="p"></p>-->
		
		<ul>
			<li>选项</li>
			<li>选项</li>
			<li>选项</li>
			<li>选项</li>
			<li>选项</li>
			
		</ul>
		
		<div></div>
		
		<span>15487</span>
	</body>
</html>
